Pulse Cage: four games in one

A girl makes a chain letter about stalking your crush. Then that chain-letter comes back to hunter her when someone new gets a hold of it. Someone sends her embarrassing video around the school, mysteriously getting a hold of it.
She works to find out who's her admirer as she grows closer to a few guys that might be him. Could it be her creepy English teacher, the boy next door with the dark past, the childhood friend across town, or the new boy with a big secret, or maybe someone else? See how this chain-letter of love and darkness unfolds.